Selective formation of MSi16 (M = Sc, Ti, and V).
Selective formation of MSi16 (M = Sc, Ti, and V).
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DOI：
10.1021/ja045380t
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发表时间：
2005-03
影响因子：
15
通讯作者：
K. Koyasu;Minoru Akutsu;M. Mitsui;A. Nakajima
中科院分区：
文献类型：
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作者：
K. Koyasu;Minoru Akutsu;M. Mitsui;A. Nakajima
金属封装的硅笼状团簇是一类新型团簇，为硅基纳米材料开辟了新的途径。我们提供了与M@Si₁₆（M = 钪、钛和钒）相对应的高度稳定团簇的实验证据。质谱和阴离子光电子能谱表明，该团簇具有一个电子封闭的TiSi₁₆中性核心，其价电子数发生变化，包括（i）用钪和钒取代相邻金属，或（ii）向TiSi₁₆阴离子添加一个卤素原子，并且预测VSi₁₆F会形成一个离子键合的超原子复合物。
Metal-encapsulated silicon cage clusters are a new class of clusters and are opening up new avenues for silicon-based nanoscale materials. We present experimental evidence for a highly stable cluster corresponding to M@Si16 (M = Sc, Ti, and V). Mass spectrometry and anion photoelectron spectroscopy show that the cluster features an electronically closed TiSi16 neutral core which undergoes a change in the number of valence electrons involving (i) substitution of neighboring metals with Sc and V, or (ii) addition of a halogen atom to the TiSi16 anion, and that VSi16F is predicted to form an ionically bound superatom complex.